|
|
- ENR
15 dB typical
- High
stability
- Good
flatness
- No
high voltage supply required
- Compact
solid state source
- High
reliability, rugged construction
|
Applications
- Calibration
- Noise
figure measurement
- Instruments
and test equipment
- Space
and Hi-Rel systems
Description
| ELVA-1
solid-state noise source ISSN series delivers a uniform
level of noise power spectral density within the whole
waveguide frequency range. Sources are available in eight
waveguide bands covering 26.4-170 GHz (so called Ka; Q;
U; V; E; W; F; D bands). The noise sources, which use
silicon IMPATT diode as a base block, are compatible with
many branded noisemeters on the market, for example HP
8970 or Ranatec Noise Figure Meter 7100. The supply voltage
for Noise Sources is 28VDC with the current consumption
of 60mA that ensure the compatibility with widely used
noisemeters from third companies. This level of 60mA current
consumption is true for all Noise Source models below
75GHz. For upper frequencies an external power supply
(that come as shipment option) should be used, and +28VDC
input should be attached to noise meter as usual. In this
case it will be used for triggering (on/off switching
of noise source).
The
typical value of ENR is 15dB with a typical flatness
of 1.5dB. All Noise Sources of ISSN series are shipped
with Calibration Passports. High stability of the sources
allows them to be used for test and instrumentation
applications in replace of commonly used gas-tube noise
sources. The additional advantage of silicon technology
is low DC power requirements. This eliminates the need
for complex high voltage supplies. There are two operation
modes: CW mode and pulsed AM mode with modulation frequency
up to 1 kHz. Typical value of excess noise ratio (ENR)
as a function of frequency is given on the plot below:
|
Specifications
|
MODEL NUMBER |
ISSN-28 |
ISSN-22 |
ISSN-19 |
ISSN-15 |
ISSN-12 |
ISSN-10 |
ISSN-08 |
ISSN-06 |
|
Frequency Band and
Range, GHz |
Ka
26.5-40 |
Q
33-50 |
U
40-60 |
V
50-75 |
E
60-90 |
W
75-110 |
F
90-140 |
D
110-170 |
|
Input waveguide |
WR28 |
WR22 |
WR19 |
WR15 |
WR12 |
WR10 |
WR8 |
WR6 |
|
Wavequide Flange |
UG-383/U |
UG-383/U |
UG-383/U-M |
UG-385/U |
UG-387/U |
UG-387/U-M |
UG-387/U-M |
UG-387/U-M |
|
Bandwidth, GHz
(min) |
Full |
|
ENR, dB (nom) |
15 |
14 |
13 |
13 |
13 |
12 |
12 |
12 |
|
Typical Flatness,
dB |
±1 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±1.5 |
±2 |
|
Stability, dB/°C |
0.01 |
|
Stability/Day, dB
(typ) |
0.05 |
|
Biasing Voltage, V |
+18 or +28 |
|
Sizes, mm
Cylinder
diameter/length
(without broadband
isolator) |
70/80 |
50/75 |
50/75 |
50/60 |
50/60 |
50/50 |
50/50 |
50/50 |
Notes:
1. Maximum operating temperature is +60°
2. Diode operating current is 50 mA.
3.
A limiting value of modulation frequency is 1 kHz (external
triggering).
4. Triggering signal amplitude is TTL level.
5. Bias voltage is +18 V. It is possible to supply the noise
source with +28VDC biasing for the compatibility with commonly
used noise meters.
6.
External triggering connector is OSM(SMA)Jack.
7.
ENR would be increased for narrower bandwidth. Please contact
factory.
There
are following controls and plugs on the control panel of the
device:
Power
connector. Specially supplied not SMA type to avoid possibility
to change it with triggering plug. Few reply connectors
are supplied together with the device.
- Triggering
plug.
- Power
switch.
- Power
indicator.
Delivery
time 6-8 weeks for all models. All ELVA-1 noise sources
are warranted by the manufacturer
for one year after receipt.
Power supply for input power 220VAC/50Hz, 110VAC/60Hz
or 100VAC/50Hz are available optionally. For the precision
control and fast modulation of the output power of the
source Voltage Controlled Attenuator VCVA series would
be supplied optionally. |
How
to Order :
|
| Specify
Model Number ISSN-XX-ABBC |
| XX-
waveguide band (WR-Number) |
| A
- flange type : |
|
|
R
= round or S
= square (WR-28 only) |
| BB
v ENR options (ENR in dB) |
| C
v AC voltage power supply options |
|
1
= 110 VAC/60Hz ,or |
|
2
= 220 VAC/50Hz, or |
|
3
= 100VAC/50Hz power supplies |
|
